chore: use shell scripts to build bdk-android

.github/workflows/publish-android.yaml

@@ -25,16 +25,10 @@ jobs:
           distribution: temurin
           java-version: 17
 
-      - name: "Set default Rust version to 1.77.1"
-        run: rustup default 1.77.1
-
-      - name: "Install Rust Android targets"
-        run: rustup target add x86_64-linux-android aarch64-linux-android armv7-linux-androideabi
-
       - name: "Build bdk-android library"
         run: |
           cd bdk-android
-          ./gradlew buildAndroidLib
+          bash ./scripts/build-linux-x86_64.sh
 
       - name: "Publish to Maven Central"
         env:

.github/workflows/test-android.yaml

@@ -37,16 +37,10 @@ jobs:
           distribution: temurin
           java-version: 17
 
-      - name: "Set default Rust version to 1.77.1"
-        run: rustup default 1.77.1
-
-      - name: "Install Rust Android targets"
-        run: rustup target add x86_64-linux-android aarch64-linux-android armv7-linux-androideabi
-
       - name: "Build Android library"
         run: |
           cd bdk-android
-          ./gradlew buildAndroidLib --console=plain
+          bash ./scripts/build-linux-x86_64.sh
 
 # There are currently no unit tests for bdk-android (see the tests in bdk-jvm instead) and the 
 # integration tests require the macOS image which is not working with the older NDK version we

bdk-android/build.gradle.kts

@@ -3,7 +3,6 @@ plugins {
     id("org.jetbrains.kotlin.android").version("1.9.23").apply(false)
     id("org.gradle.maven-publish")
     id("org.gradle.signing")
-    id("org.bitcoindevkit.plugins.generate-android-bindings").apply(false)
     id("io.github.gradle-nexus.publish-plugin").version("1.1.0").apply(true)
 }
 

bdk-android/justfile

@@ -1,8 +1,11 @@
 default:
   just --list
 
-build:
-  ./gradlew buildAndroidLib
+build-linux:
+  bash ./scripts/build-linux-x86_64.sh
+
+build-macos:
+  bash ./scripts/build-macos-aarch64.sh
 
 clean:
   rm -rf ../bdk-ffi/target/

bdk-android/lib/build.gradle.kts

@@ -8,9 +8,6 @@ plugins {
     id("org.jetbrains.kotlin.android")
     id("org.gradle.maven-publish")
     id("org.gradle.signing")
-
-    // Custom plugin to generate the native libs and bindings file
-    id("org.bitcoindevkit.plugins.generate-android-bindings")
 }
 
 android {
@@ -19,7 +16,6 @@ android {
 
     defaultConfig {
         minSdk = 24
-        targetSdk = 34
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles("consumer-rules.pro")
     }
@@ -106,15 +102,6 @@ afterEvaluate {
             }
         }
     }
-
-    // This is required because we must ensure the moveNativeAndroidLibs task is executed after
-    // the mergeReleaseJniLibFolders (hard requirement introduced by our upgrade to Gradle 8.7)
-    tasks.named("mergeReleaseJniLibFolders") {
-        dependsOn(":lib:moveNativeAndroidLibs")
-    }
-    tasks.named("mergeDebugJniLibFolders") {
-        dependsOn(":lib:moveNativeAndroidLibs")
-    }
 }
 
 signing {
@@ -128,8 +115,3 @@ signing {
     useInMemoryPgpKeys(signingKeyId, signingKey, signingPassword)
     sign(publishing.publications)
 }
-
-// This task dependency ensures that we build the bindings binaries before running the tests
-tasks.withType<KotlinCompile> {
-    dependsOn("buildAndroidLib")
-}

bdk-android/scripts/build-linux-x86_64.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+if [ -z "$ANDROID_NDK_ROOT" ]; then
+    echo "Error: ANDROID_NDK_ROOT is not defined in your environment"
+    exit 1
+fi
+
+PATH="$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH"
+CFLAGS="-D__ANDROID_MIN_SDK_VERSION__=24"
+AR="llvm-ar"
+LIB_NAME="libbdkffi.so"
+COMPILATION_TARGET_ARM64_V8A="aarch64-linux-android"
+COMPILATION_TARGET_X86_64="x86_64-linux-android"
+COMPILATION_TARGET_ARMEABI_V7A="armv7-linux-androideabi"
+RESOURCE_DIR_ARM64_V8A="arm64-v8a"
+RESOURCE_DIR_X86_64="x86_64"
+RESOURCE_DIR_ARMEABI_V7A="armeabi-v7a"
+
+# Move to the Rust library directory
+cd ../bdk-ffi/ || exit
+rustup default 1.77.1
+rustup target add $COMPILATION_TARGET_ARM64_V8A $COMPILATION_TARGET_ARMEABI_V7A $COMPILATION_TARGET_X86_64 
+
+# Build the binaries
+# The CC and CARGO_TARGET_<TARGET>_LINUX_ANDROID_LINKER environment variables must be declared on the same line as the cargo build command
+CC="aarch64-linux-android24-clang" CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER="aarch64-linux-android24-clang" cargo build --profile release-smaller --target $COMPILATION_TARGET_ARM64_V8A
+CC="x86_64-linux-android24-clang" CARGO_TARGET_X86_64_LINUX_ANDROID_LINKER="x86_64-linux-android24-clang" cargo build --profile release-smaller --target $COMPILATION_TARGET_X86_64
+CC="armv7a-linux-androideabi24-clang" CARGO_TARGET_ARMV7_LINUX_ANDROIDEABI_LINKER="armv7a-linux-androideabi24-clang" cargo build --profile release-smaller --target $COMPILATION_TARGET_ARMEABI_V7A
+
+# Copy the binaries to their respective resource directories
+mkdir -p ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARM64_V8A/
+mkdir -p ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARMEABI_V7A/
+mkdir -p ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_X86_64/
+cp ./target/$COMPILATION_TARGET_ARM64_V8A/release-smaller/$LIB_NAME ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARM64_V8A/
+cp ./target/$COMPILATION_TARGET_ARMEABI_V7A/release-smaller/$LIB_NAME ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARMEABI_V7A/
+cp ./target/$COMPILATION_TARGET_X86_64/release-smaller/$LIB_NAME ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_X86_64/
+
+# Generate Kotlin bindings using uniffi-bindgen
+cargo run --bin uniffi-bindgen generate --library ./target/$COMPILATION_TARGET_ARM64_V8A/release-smaller/$LIB_NAME --language kotlin --out-dir ../bdk-android/lib/src/main/kotlin/ --no-format

bdk-android/scripts/build-macos-aarch64.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+if [ -z "$ANDROID_NDK_ROOT" ]; then
+    echo "Error: ANDROID_NDK_ROOT is not defined in your environment"
+    exit 1
+fi
+
+PATH="$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/darwin-x86_64/bin:$PATH"
+CFLAGS="-D__ANDROID_MIN_SDK_VERSION__=24"
+AR="llvm-ar"
+LIB_NAME="libbdkffi.so"
+COMPILATION_TARGET_ARM64_V8A="aarch64-linux-android"
+COMPILATION_TARGET_X86_64="x86_64-linux-android"
+COMPILATION_TARGET_ARMEABI_V7A="armv7-linux-androideabi"
+RESOURCE_DIR_ARM64_V8A="arm64-v8a"
+RESOURCE_DIR_X86_64="x86_64"
+RESOURCE_DIR_ARMEABI_V7A="armeabi-v7a"
+
+# Move to the Rust library directory
+cd ../bdk-ffi/ || exit
+rustup default 1.77.1
+rustup target add $COMPILATION_TARGET_ARM64_V8A $COMPILATION_TARGET_ARMEABI_V7A $COMPILATION_TARGET_X86_64 
+
+# Build the binaries
+# The CC and CARGO_TARGET_<TARGET>_LINUX_ANDROID_LINKER environment variables must be declared on the same line as the cargo build command
+CC="aarch64-linux-android24-clang" CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER="aarch64-linux-android24-clang" cargo build --profile release-smaller --target $COMPILATION_TARGET_ARM64_V8A
+CC="x86_64-linux-android24-clang" CARGO_TARGET_X86_64_LINUX_ANDROID_LINKER="x86_64-linux-android24-clang" cargo build --profile release-smaller --target $COMPILATION_TARGET_X86_64
+CC="armv7a-linux-androideabi24-clang" CARGO_TARGET_ARMV7_LINUX_ANDROIDEABI_LINKER="armv7a-linux-androideabi24-clang" cargo build --profile release-smaller --target $COMPILATION_TARGET_ARMEABI_V7A
+
+# Copy the binaries to their respective resource directories
+mkdir -p ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARM64_V8A/
+mkdir -p ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARMEABI_V7A/
+mkdir -p ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_X86_64/
+cp ./target/$COMPILATION_TARGET_ARM64_V8A/release-smaller/$LIB_NAME ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARM64_V8A/
+cp ./target/$COMPILATION_TARGET_ARMEABI_V7A/release-smaller/$LIB_NAME ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_ARMEABI_V7A/
+cp ./target/$COMPILATION_TARGET_X86_64/release-smaller/$LIB_NAME ../bdk-android/lib/src/main/jniLibs/$RESOURCE_DIR_X86_64/
+
+# Generate Kotlin bindings using uniffi-bindgen
+cargo run --bin uniffi-bindgen generate --library ./target/$COMPILATION_TARGET_ARM64_V8A/release-smaller/$LIB_NAME --language kotlin --out-dir ../bdk-android/lib/src/main/kotlin/ --no-format

bdk-android/settings.gradle.kts

@@ -1,7 +1,6 @@
 rootProject.name = "bdk-android"
 
 include(":lib")
-includeBuild("plugins")
 
 pluginManagement {
     repositories {